136 



KRAPFIELLA MIRABILIS, PRESTON, AND ITS AFFINITIES. . 

 By Hugh Watson, M.A. 



Read 10th December, 1920. 



In 1911 Mr. Preston described a new shell from Mount Kenya, 

 which seemed to him to be so singular that he named it Krapfiella 

 mirabilis, establishing a new genus for its reception.^ Through the 

 kindness of Major M. Connolly and Mr. W. Falcon, I have lately 

 received a specimen of this remarkable species, collected by Colin 

 Harries in the Ndarugu River Valley, Kenya Colony, probably 

 about 50 miles from Nairobi. The aperture of the shell was closed 

 by a moderately thick epiphragm, and behind this I found some 

 shrivelled remains of the animal, together with four embryos, 

 indicating that the snail is viviparous. 



CZDI 



8 7 

 H 



Q 



1 



Krapfiella mieabilis, Preston. 



FIG. 



A. Full-grown shell, x 1. 



B. Embryonic shell, x 2. 

 c. Jaw. X 10. 



D. Part of reproductive system, x 1'5. 



E. Hinder end of foot. x 3. 



F. Mantle-edge, x 1-5. 



G. Teeth from near front end of embryonic radula. x 200. 

 H. Teeth from near hind end of embryonic radula. x 200. 

 I. Teeth from full-grown radula. x 200. 



1 Ann. Mag. Nat. Hist., ser. viii, vol. vii, p. 472, pi. xii, figs. 25a, 25b. 

 Two additional and much larger species of Krap-fiella were subsequently 

 described by Preston in these Proceedings (vol. x, 1913, pp. 283-4). 



